Closure piece for medical syringe

Abstract

A closure piece ( 1 ) for a medical syringe is provided, the syringe having a syringe barrel ( 3 ) and a syringe neck ( 23 ). The closure piece has an adapter ( 6 ) which can be fitted onto the syringe neck ( 23 ). A screw-type closure piece ( 4 ) can be fitted onto the adapter ( 6 ). A twist-off ring ( 13 ) is connected to the screw-type closure piece ( 4 ). A closure cap ( 5 ) can be introduced into the syringe neck ( 23 ).

1. Closure piece ( 1 ) for a medical syringe having a syringe barrel ( 3 ) and a syringe neck ( 23 ) connected to a distal end thereof, with an adapter ( 6 ) which can be fitted onto the syringe neck ( 23 ), a screw-type closure piece ( 4 ) which can be fitted onto the adapter ( 6 ), a twist-off ring ( 13 ) connected to the screw-type closure piece ( 4 ), and a closure cap ( 5 ) which can be introduced into the syringe neck ( 23 ), in which the screw-type closure piece ( 4 ) and the twist-off ring ( 13 ) are connected to one another spaced apart by connectors ( 14 ), and first projections ( 16 ) extending to the twist-off ring ( 13 ) are provided on the screw-type closure piece ( 4 ) and second projections ( 17 ) extending to the screw-type closure piece ( 4 ) on the twist-off ring ( 13 ) are provided adjacent to the first projections ( 16 ), and in which the edge ( 18 ,  19 ) of a projection ( 16 ,  17 ), facing the adjacent projection ( 17 ,  16 ), extends substantially in the direction of the longitudinal axis ( 7 ) of the screw-type closure piece ( 4 ) and the edge ( 20 ,  21 ) of a projection ( 16 ,  17 ), averted from the adjacent projection ( 17 ,  16 ), is inclined relative to the longitudinal axis ( 7 ) of the screw-type closure piece ( 4 ). 
     
     
       2. Closure piece according to  claim 1 , in which the adapter ( 6 ) has an outer thread ( 25 ) at its distal end and the screw-type closure piece ( 4 ) has a complementary inner thread ( 12 ). 
     
     
       3. Closure piece according to  claim 1 , in which the adapter ( 6 ) has a flange ( 26 ) at its proximal end. 
     
     
       4. Closure piece according to  claim 1 , in which the connectors ( 14 ) have a trapezoid form symmetrical to the longitudinal axis ( 7 ) of the screw-type closure piece ( 4 ). 
     
     
       5. Closure piece according to  claim 1 , in which the screw-type closure piece ( 4 ) has a cover plate ( 8 ). 
     
     
       6. Closure piece according to  claim 5 , in which opening segments ( 9 ) are formed in the cover plate ( 8 ) for introducing a rotary tool and/or for exposing the closure cap ( 5 ). 
     
     
       7. Closure piece according to  claim 5 , in which a spherical bead ( 22 ) for pressing the closure cap ( 5 ) is formed on the inside of the cover plate ( 8 ).